Framework break angle loss reducing structure

Abstract

The utility model discloses a framework bevel loss reducing structure which comprises a base, an upper die and a lower die, the upper die and the lower die are oppositely arranged, the upper die and the lower die are both installed on the base, and the opposite end portions of the upper die and the lower die are respectively provided with an inclined face used for framework bevel. Rotatable cylindrical balls are arranged at the stress positions of the two inclined planes and the framework respectively. According to the technical scheme, when the upper die, the lower die and the framework extrude each other, friction is reduced through rolling of the cylindrical balls at stress positions, so that damage of the upper die and the lower die to the framework is reduced, and the service life of the die and the service life of the fan blades can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fan blade manufacturing, in particular to a frame angle reduction structure. Background Art

[0002] The axial flow fan blade frame is one of the important components of the fan blade. The blade and the frame are connected by rivets. To adjust the air volume of the axial flow fan, it is generally adjusted by changing the frame angle to raise the windward side of the blade.

[0003] During the frame bending process, since both the mold and the frame are rigid, and the stress point of the frame bending is not the surface but the point or line, this often causes damage to the fan blade frame with an excessive installation angle. The bending position is exactly where the fan blade is subjected to the greatest force. In order to reduce the damage to the frame at this point, the existing frame production process generally solves this problem by adding lubricating oil, increasing the chamfer at the mold contact point, and reducing the frame bending angle. Utility Model Content

[0004] The main purpose of the utility model is to provide a frame angle reduction structure, aiming to solve the technical problem that the current fan blade frame is easily damaged during the production process.

[0005] In order to achieve the above-mentioned purpose, the utility model proposes a frame corner loss reduction structure, which includes:

[0006] Pedestal;

[0007] An upper die and a lower die are arranged opposite to each other, the upper die and the lower die are both mounted on the base, and opposite ends of the upper die and the lower die have inclined surfaces for bending the frame;

[0008] Wherein, rotatable cylindrical balls are respectively arranged at the force-bearing positions of the two inclined surfaces and the frame.

[0009] Optionally, the surface of the ball is tangent to the inclined surface.

[0010] Optionally, the two inclined surfaces are parallel to each other.

[0011] Optionally, the opposite ends of the upper die and the lower die respectively have rounded surfaces, and the ball bearing is arranged between the inclined surface and the rounded surface.

[0012] Optionally, the surface of the ball of the upper die is lower than the rounded surface, and the surface of the ball of the lower die is higher than the rounded surface.

[0013] Optionally, the two balls are arranged parallel to each other.

[0014] Optionally, there are multiple upper dies and multiple lower dies.

[0015] Optionally, each of the upper dies and each of the lower dies are arranged along the circumferential direction.

[0016] In the technical solution of the utility model, when the upper and lower molds and the frame are squeezed against each other, friction is reduced by rolling of cylindrical balls at the stress-bearing positions, thereby reducing damage caused by the upper and lower molds to the frame and increasing the service life of the mold and the service life of the fan blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 A top view of an embodiment of a frame corner loss reduction structure provided by the utility model;

[0019] Figure 2 for Figure 1 A cross-sectional view of the middle structure in one state;

[0020] Figure 3 for Figure 1 Cross-sectional view of the middle structure in one state.

[0021] In the figure: skeleton corner reduction structure-100, base-1, upper mold-2, lower mold-3, ball-4, inclined surface-5, rounded surface-6, skeleton-7.

[0022] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] In order to better describe and illustrate the embodiments of the present application, reference may be made to one or more drawings, but the additional details or examples used to describe the drawings should not be considered as limiting the scope of the utility model creation of the present application, any of the currently described embodiments or preferred methods.

[0025] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" are based on the positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention. They do not indicate that the device referred to must have a specific direction or operate in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0027] During the frame bending process, since both the mold and the frame are rigid, and the force point of the frame bending is not the surface but the point, this results in the fan blades with too large an installation angle often causing damage to the frame.

[0028] In view of this, the utility model provides a frame corner loss reduction structure. Figure 1-3 For an embodiment of the frame corner loss reduction structure provided by the utility model, please refer to Figure 1-3 The skeleton angle reduction structure 100 includes a base 1 and an upper mold 2 and a lower mold 3 that are relatively arranged.

[0029] Specifically, the upper mold 2 and the lower mold 3 are both installed on the base 1 (part of the structure is hidden), and the upper mold 2 and the lower mold 3 can be connected by a driving device, so that the two have a movable stroke in the up and down direction, and the opposite ends of the two are provided with inclined surfaces 5, and the skeleton 7 of the fan blade is placed between the upper and lower molds 3. The protruding sections of the two inclined surfaces 5, that is, the force-bearing parts, make the skeleton 7 bend. Among them, the force-bearing parts of the two inclined surfaces 5 and the skeleton 7 are respectively provided with rotatable cylindrical balls 4.

[0030] In the technical solution of the utility model, when the upper and lower molds 3 and the skeleton 7 are squeezed against each other, the friction is reduced by rolling the cylindrical balls 4 at the stress-bearing position, thereby reducing the damage caused by the upper and lower molds 3 to the skeleton 7, and also increasing the service life of the mold and the service life of the fan blade. This structure can be a modified style that reduces the damage to the skeleton 7 by adding cylindrical balls 4 without changing the overall structure of the mold, and can also increase the service life of the mold. This structure has the advantages of reasonable and simple structure, low production cost, and easy use, bringing loss reduction and overall cost reduction effects to the fan.

[0031] See also Figure 2 and Figure 3In one embodiment of the utility model, the surface of the ball 4 is tangent to the inclined surface 5. When the frame 7 is folded, the ball 4 at the force-bearing position of the upper and lower molds 3 rolls while squeezing the frame 7, and the frame 7 continuously moves toward the inclined surface 5, thereby achieving the folding of the frame 7. The upper and lower molds 3 of this structure will not cause indentations on the surface of the frame 7, and the frame 7 is evenly stressed, so it is not easy to be damaged and cause the fan blade to break.

[0032] See also Figure 3 In one embodiment of the present invention, the two inclined surfaces 5 are parallel to each other, and the angle of the two inclined surfaces 5 is also the folding angle of the frame 7. When the folding angle of the frame 7 is completed, the surface of the frame 7 and the two inclined surfaces 5 are in contact with each other.

[0033] In order to improve the installation strength of the ball 4, the ball 4 is embedded in the ends of the upper and lower molds 3, please refer to Figure 2 and Figure 3 In one embodiment of the utility model, the opposite ends of the upper mold 2 and the lower mold 3 are provided with a rounded surface 6, and the ball 4 is arranged between the inclined surface 5 and the rounded surface 6, and the ball 4 transitions from the inclined surface 5 to the rounded surface 6.

[0034] To avoid friction between the fillet surface 6 and the frame 7, please refer to Figure 2 and Figure 3 In one embodiment of the utility model, the surface of the ball 4 of the upper mold 2 is lower than the rounded surface 6, and the surface of the ball 4 of the lower mold 3 is higher than the rounded surface 6. Such a structure can prevent the rounded surface 6 from contacting the frame 7 when the ball 4 at the force-bearing position of the upper and lower molds 3 is bent to the frame 7.

[0035] See also Figure 2 and Figure 3 In one embodiment of the present invention, the two cylindrical balls 4 are arranged parallel to each other so as to apply force evenly to the frame 7 to complete the folding. Of course, the implementation of the present invention is not limited to this, and the two balls 4 can also be arranged non-parallel, but the folding force of the frame 7 is uneven.

[0036] Since multiple blades can be installed in the circumference of the skeleton 7, please refer to Figure 1 In one embodiment of the utility model, the upper mold 2 and the lower mold 3 are each provided with a plurality of molds, which can simultaneously perform the corner bending of the skeleton 7 .

[0037] Furthermore, each of the upper dies 2 and each of the lower dies 3 are arranged along the circumferential direction and correspond to each corner of the skeleton 7 .

[0038] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A skeleton angle reduction structure, characterized in that: include: Pedestal; An upper die and a lower die are arranged opposite to each other, the upper die and the lower die are both mounted on the base, and opposite ends of the upper die and the lower die have inclined surfaces for bending the frame; Wherein, rotatable cylindrical balls are respectively arranged at the force-bearing positions of the two inclined surfaces and the frame.

2. The skeleton angle loss reduction structure according to claim 1, characterized in that: The surface of the ball is tangent to the inclined surface.

3. The skeleton angle loss reduction structure according to claim 1, characterized in that: The two inclined surfaces are parallel to each other.

4. The skeleton angle loss reduction structure according to claim 1, characterized in that: The opposite ends of the upper die and the lower die respectively have rounded surfaces, and the ball bearings are arranged between the inclined surfaces and the rounded surfaces.

5. The skeleton angle loss reduction structure according to claim 4, characterized in that: The surface of the ball of the upper die is lower than the rounded surface, and the surface of the ball of the lower die is higher than the rounded surface.

6. The skeleton angle loss reduction structure according to claim 1, characterized in that: The two balls are arranged parallel to each other.

7. The skeleton angle loss reduction structure according to claim 1, characterized in that: The upper mold and the lower mold are each provided with a plurality.

8. The frame angle loss reduction structure according to claim 7, characterized in that: Each of the upper dies and each of the lower dies are arranged along the circumferential direction.

Images